Volume 33 Issue 12
Dec.  2018
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Application of γ-Reθt transition model in investigation of flow characteristics in microchannel[J]. Journal of Aerospace Power, 2018, 33(12). doi: 10.13224/j.cnki.jasp.2018.12.004
Citation: Application of γ-Reθt transition model in investigation of flow characteristics in microchannel[J]. Journal of Aerospace Power, 2018, 33(12). doi: 10.13224/j.cnki.jasp.2018.12.004

Application of γ-Reθt transition model in investigation of flow characteristics in microchannel

doi: 10.13224/j.cnki.jasp.2018.12.004
  • Received Date: 2017-09-21
  • Publish Date: 2018-12-28
  • Numerical investigation was conducted with ANSYS CFX to investigate the flow characteristics in a rectangular microchannel. The performance of laminar model, γ-Reθt transition model and shear stress transport model in microchannel transition simulation was examined by comparing the predicted results with the experimental data. Furthermore, the effects of length-to-diameter ratio and aspect ratio were also investigated. Results indicated that only the γ-Reθt model predicted the trend of transition and forecasted a critical Reynolds number close to the experimental result. Length-to-diameter ratio over 200 was suggested to eliminate the influence of the entrance effect. The critical Reynolds number increased when the aspect ratio varied from 1 to 5.

     

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